21:30:39 java.lang.ClassCastException: java.lang.invoke.MemberName incompatible with java.lang.invoke.VarHandle$AccessDescriptor 21:30:39 at ...
Caused by: java.lang.NullPointerException: Cannot invoke "java.util.Map.keySet()" because the return value of "io.swagger.v3.oas.models.media.Discriminator.getMapping ...